The garden store suspects a bacterial infection from the weather swings, and all the rain. They suggested Bon-Neem, so I sprayed it on. Here's hopin' . . .

Any luck? My bean plants look similar. Started as tan/brown dry patches and after heavy rain spread quickly. Now displaying grayish tones. Ugh! Prior to rain, my local garden store thought it could be powdery mildew...not characteristic of blight or leaf spot, but now I'm starting to wonder. I treated with a copper fungicide and 7 days later neem oil. 2 days after last treatment, and after rain the pole beans look beyond repair. I'm suspecting weather fluctuations and a few dead moldy leaves that made there way into my garden bed from neighbors yard.

Before: just a few infected leaves. Pruned when dry and sterilized between pruning. Otherwise very healthy.

After Rain: Pole beans look horrible. I may have to start over.

Suspect??